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Use cold-rolled steel strip and galvanized steel strip (electrogalvanized and hot-dip galvanized) as the substrate on the continuous unit, after surface pretreatment (degreasing and chemical treatment), apply one or more layers of liquid by roller coating After coating, the plate obtained by baking and cooling is a coated steel plate. Because the coating can have a variety of colors, it is customary to call the layered steel plate a colored coated steel plate. The coating is carried out before the steel sheet is formed, which is called pre-coated steel sheet abroad. The color-coated steel plate is an organic coating applied to the surface just now. It has the advantages of beautiful appearance, bright colors, high strength, good corrosion resistance, convenient processing and forming, and can also reduce costs and reduce pollution for users.
Since the establishment of the first continuous coated plate line in the United States in 1935, color-coated steel plates have been widely used. At present, there are many types of color-coated plates, about 600 kinds. The advantages of color-coated plates and both organic polymers and steel plates, It not only has good color, formability, corrosion resistance and decoration of organic polymers, but also has high strength and easy workability of steel plates. It can be easily processed by punching, cutting, bending, bending and deep drawing. This makes the organic coated steel sheet with excellent practicality, decoration, workability and durability.